This is a XLR/D-Style-Case for putting on a DIN-Rail with the cover still going on. In my case used for allowing easy programming access to BMS-installations (KNX/EIB). There is a closed version which uses 4 M3*12 screws to screw on the lid. The other version is opened on one side. The hole for the cable is perfectly sized to accomodate a KNX-cable (Y(St)Y)
The author marked this model as their own original creation.